Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a7f602cd249cacc…

MALICIOUS

PDF

80.5 KB Created: 2020-11-03 16:18:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cb22247370a89444262ee1e42a7712c4 SHA-1: f109f103f9ea9c1855e8bdb147674a7c2a09a09d SHA-256: 5a7f602cd249cacccaa6b08fa09f471a8d7403ba1b50496b7058fe2a633ae827
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector, which is flagged as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/123?keyword=kingroot+apk+for+samsung+s7+edge', suggesting a lure to download software. The PDF also hosts a large number of external links, many pointing to benign files, but the primary malicious link is the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/123?keyword=kingroot+apk+for+samsung+s7+edge In PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/taxisogo.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/8d2795.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/wurusu.pdfIn PDF document text
    • https://luxexawasoju.weebly.com/uploads/1/3/4/1/134109261/kokis.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/4102594.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/molecular_biology_experiments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de3ce61-36b5-4e77-ab0b-9f7eca29d777/gladstone_high_school_yearbook.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/nodazolifenolinopam.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/bipiverixusi.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/101_reasons_to_use_legalshield.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19d2682e-4f2c-41d0-b9be-b723460a6b25/96838975600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56e6b816-2ee5-4d9a-83cc-c4a0b4af6dea/jimexujidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e040bf1-576e-4318-9da1-433107df029c/chloroplast_structure_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/barfoed_s_test_for_carbohydrates.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE066 5444 bytes
SHA-256: 8d71d9d7c12140c9a684053e352ba8c1ca71d9bfff4f318d1f866da897430738
font_01_sfnt_off0000f2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E8 12892 bytes
SHA-256: ae2876b5fc7ef1fd6a0e4d17da60fb311b1782ec4981bd34f85413f682ae06f2
font_02_sfnt_off00011dbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBC 16636 bytes
SHA-256: aa9cdc931583ddf61373f200b825d7cba4673712ff2ba3231b11627db7188b05

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